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Fair value measurements and Hedging - Additional Information (Details) € in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2018 EUR (€) | Jun. 30, 2017 USD ($) | Apr. 30, 2018 EUR (€) | Dec. 31, 2017 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Amount expected to be reclassified into earnings |  | $ 788 |  |  |  |
Trading Symbol |  | SBLK | SBLK |  |  |
Amount of cash held | $ 218,651 | $ 218,651 |  |  |  | $ 257,911
Foreign exchange gain/ (loss) |  | (2,794) |  |  |  |
Fair value hedge gain/ (loss) |  | 1,405 |  | $ 0 |  |
Fair value hedging |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Amount of cash held | € |  |  |  |  | € 40,000 |
Fair value hedge gain/ (loss) | 1,405 |  |  |  |  |
Ineffective portion of fair value hedge |  | 39 |  |  |  |
Payments for vessels upgrade | € |  |  | € 5,100 |  |  |
Fair value hedging | Fixed orders |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Amount of cash held | € |  |  |  |  | € 20,500 |
Percentage of coverage through foreign currency hedging |  |  |  |  | 100.00% |
Fair value hedging | Optional orders |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Percentage of coverage through foreign currency hedging |  |  |  |  | 50.00% |
Quoted Prices in Active Markets for Identical Liabilities (Level 1) |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
2022 Notes fair value | $ 51,266 | $ 51,266 |  |  |  |
8.30% 2022 Notes |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Trading Symbol |  | SBLKZ | SBLKZ |  |  |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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